I'm not sure if these are correct. Can anyone correct these for me?

- Calculate the frequency and period of a bee that beats its wings 3000 times in 30s.

f = 3000/30 = 100Hz
T = 1/100 = 0.01 s.

- An acoustic guitar contains a sound box that increases the loudness of the sounds the strings make. This is due to the property called -
a) amplification
b) refraction
c) Reflection
d) Resonance
e) Interference

I picked b.

I think I might have picked d) resonance

For the first question, you correctly calculated the frequency and period of the bee's wing beats. The frequency is calculated by dividing the number of wing beats (3000) by the time it takes (30 seconds), which gives you 100 Hz. The period is the reciprocal of frequency, so you calculated that correctly as well, giving you a period of 0.01 seconds. So your answers for this question are correct.

For the second question, the property that increases the loudness of the sounds the strings make in an acoustic guitar is called resonance. Resonance in this context refers to the phenomenon where the sound waves produced by the vibrating strings are amplified as they resonate or "bounce" within the sound box of the guitar. Therefore, the correct answer is d) Resonance. You picked b) Refraction, which is not the correct answer.